Explain how many thousandths are in one hundredth?

All units in our 0-9 numbering system increase in value by 10 as you move from right to left, so, just as there are 10 one-hundreds in one thousand (100 x 10 = 1,000), so to are there ten one-thousandths in one one-hundredth (0.001 x 10 = 0.01)